Make rotate_image_tensor's results fully BC with v1 (#7271)

torchvision/transforms/v2/functional/_geometry.py

@@ -832,8 +832,8 @@ def rotate_image_tensor(
     center_f = [0.0, 0.0]
     if center is not None:
         if expand:
+            # TODO: Do we actually want to warn, or just document this?
             warnings.warn("The provided center argument has no effect on the result if expand is True")
-        else:
         # Center values should be in pixel coordinates but translated such that (0, 0) corresponds to image center.
         center_f = [(c - s * 0.5) for c, s in zip(center, [width, height])]